This is kind of cheating as it's existing songs rather than score but the addition of the character voiceover on this World's End Girlfriend track from the film Air Doll is wonderful, especially when you read the translation:
http://www.youtube.com/watch?v=wX8f6TJaryo

I really liked the Hired Hand OST (even though its difficult to find a physical version) and Yo La Tengo 'They shoot, We score' album is great. What about soundtracks made for films that don't exist or weren't included in the original movie such as DROKK!

Some of it ended up in Jarmusch's Limits Of Control, along with a bunch of Boris stuff. I'd not heard of The Hired Hand, really liking what I've heard so far. May have to check out that film based solely on that